WO2007115099A2 - appareil destiné au mélange des gaz et des liquides - Google Patents

appareil destiné au mélange des gaz et des liquides Download PDF

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Publication number
WO2007115099A2
WO2007115099A2 PCT/US2007/065514 US2007065514W WO2007115099A2 WO 2007115099 A2 WO2007115099 A2 WO 2007115099A2 US 2007065514 W US2007065514 W US 2007065514W WO 2007115099 A2 WO2007115099 A2 WO 2007115099A2
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WO
WIPO (PCT)
Prior art keywords
liquid
gas
blade
rotatable shaft
pumping
Prior art date
Application number
PCT/US2007/065514
Other languages
English (en)
Other versions
WO2007115099A3 (fr
Inventor
Blair H. Hills
Original Assignee
Hills Blair H
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hills Blair H filed Critical Hills Blair H
Priority to CA 2646848 priority Critical patent/CA2646848C/fr
Priority to CN2007800115304A priority patent/CN101410171B/zh
Priority to EP07759706A priority patent/EP2001579A4/fr
Publication of WO2007115099A2 publication Critical patent/WO2007115099A2/fr
Publication of WO2007115099A3 publication Critical patent/WO2007115099A3/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/234—Surface aerating
    • B01F23/2342—Surface aerating with stirrers near to the liquid surface, e.g. partially immersed, for spraying the liquid in the gas or for sucking gas into the liquid, e.g. using stirrers rotating around a horizontal axis or using centrifugal force
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/14—Activated sludge processes using surface aeration
    • C02F3/18—Activated sludge processes using surface aeration the aerator having a horizontal axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2331—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements
    • B01F23/23311—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements through a hollow stirrer axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2333—Single stirrer-drive aerating units, e.g. with the stirrer-head pivoting around an horizontal axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2336—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the location of the place of introduction of the gas relative to the stirrer
    • B01F23/23367—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the location of the place of introduction of the gas relative to the stirrer the gas being introduced behind the stirrer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/234—Surface aerating
    • B01F23/2342—Surface aerating with stirrers near to the liquid surface, e.g. partially immersed, for spraying the liquid in the gas or for sucking gas into the liquid, e.g. using stirrers rotating around a horizontal axis or using centrifugal force
    • B01F23/23421—Surface aerating with stirrers near to the liquid surface, e.g. partially immersed, for spraying the liquid in the gas or for sucking gas into the liquid, e.g. using stirrers rotating around a horizontal axis or using centrifugal force the stirrers rotating about a vertical axis
    • B01F23/234211—Stirrers thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/237—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media
    • B01F23/2376—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media characterised by the gas being introduced
    • B01F23/23761—Aerating, i.e. introducing oxygen containing gas in liquids
    • B01F23/237612—Oxygen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/237—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media
    • B01F23/2376—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media characterised by the gas being introduced
    • B01F23/23764—Hydrogen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/07—Stirrers characterised by their mounting on the shaft
    • B01F27/072—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis
    • B01F27/0721—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis parallel with respect to the rotating axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/07—Stirrers characterised by their mounting on the shaft
    • B01F27/072—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis
    • B01F27/0722—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis perpendicular with respect to the rotating axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/07—Stirrers characterised by their mounting on the shaft
    • B01F27/072—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis
    • B01F27/0724—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis directly mounted on the rotating axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/07—Stirrers characterised by their mounting on the shaft
    • B01F27/072—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis
    • B01F27/0726—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis having stirring elements connected to the stirrer shaft each by a single radial rod, other than open frameworks
    • B01F27/07261—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis having stirring elements connected to the stirrer shaft each by a single radial rod, other than open frameworks of the anchor type, i.e. the stirring elements being connected to the rods by one end and extending parallel to the shaft axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/07—Stirrers characterised by their mounting on the shaft
    • B01F27/072—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis
    • B01F27/0727—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis having stirring elements connected to the stirrer shaft each by two or more radial rods, e.g. the shaft being interrupted between the rods, or of crankshaft type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
    • B01F27/1121—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades pin-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/305—Treatment of water, waste water or sewage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/44—Mixing of ingredients for microbiology, enzymology, in vitro culture or genetic manipulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/237—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media
    • B01F23/2376—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media characterised by the gas being introduced
    • B01F23/23761—Aerating, i.e. introducing oxygen containing gas in liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/237—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media
    • B01F23/2376—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media characterised by the gas being introduced
    • B01F23/23763—Chlorine or chlorine containing gases
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Definitions

  • the present invention relates to gas and liquid mixers for use in various applications such as wastewater systems, chemical reactors, mass transfer systems and the like.
  • Gas-liquid mixing systems are conventionally used for many purposes, such as the mass transfer of gases into and/or out of liquids. Oxidation and reduction reactions often require that a gas, such as oxygen, chlorine or hydrogen, be mixed with liquids in the presence of solids. Unwanted gases dissolved in liquids can be stripped from the liquid by mixing a desired gas into the liquid. Direct contact heating of a liquid requires that a hot gas be mixed into a liquid, and, in some instances, the pH of a liquid can be adjusted by mixing a gaseous acid or base into the liquid.
  • a gas such as oxygen, chlorine or hydrogen
  • oxygen gas is often mixed with various liquids.
  • Oxygen gas can be mixed with activated sludge to aerate waste material and assist in digestion, it can be used to oxidize carbon, sulfur and/or nitrogen containing material in a liquid, it can also be mixed with liquids containing organic compounds to oxidize the organic compounds into alcohols, aldehydes and acids, or it can be mixed with hydrometallurgical process liquids to achieve various desired effects.
  • Oxygen gas can also be mixed with liquids to oxidize nitrogen- containing compounds into nitroso-containing materials, nitrites and/or nitrates.
  • Oxygen gas can be mixed with liquids to oxidize sulfur-containing compounds into disulfides, sulfoxides and/or sulfates.
  • the formation of hydrogen sulfide can occur in any aquatic based system containing sulfates in which the dissolved oxygen does not meet the oxygen demand. Even small quantities of hydrogen sulfide can produce objectionable odors thereby necessitating that oxygen be mixed into the liquid.
  • Industrial and municipal wastewater can also be treated by biological treatment techniques in which aerobic microorganisms convert contaminants into oxidized compounds such as carbon dioxide gas and biomass. Sufficient oxygen must be provided to the aerobic organisms in order to carry out the necessary biological processes, chemical oxidation and/or fermentation processes.
  • Hydrogen gas can also be mixed with various liquids or liquid solid mixtures.
  • hydrogen gas can be used to saturate carbon-carbon double bonds and to reduce nitro and nitroso compounds in organic materials.
  • Hydrogen gas can also be mixed into liquids present in vegetable oils processing, yeast production, vitamin C production, coal liquefaction, and the production of other types of unsaturated organic liquids.
  • Chlorine gas can also be mixed with organic and inorganic liquids.
  • Carbon monoxide gas can also be mixed with liquids containing organic compounds. In each of these examples, gas can be mixed into a liquid to dissolve and react with the liquid and/or liquid solid mixture to achieve various desired effects.
  • Diffused gas delivery systems that require gas compression typically comprise coarse, medium or fine bubble diffusers, liquid motive force venturi, jet type mixers that require large pumping systems, or agitators that utilize hollow members or spargers positioned downstream of them to deliver pressurized gas to a mixing zone.
  • Diffused gas delivery systems that do not require gas compression equipment typically comprise self-inducing systems such as venturi systems, vortex systems, and rotor/stator pitched blade turbine reactors.
  • Porous materials can also stretch over time, thereby increasing hole size and bubble formation diameter, or harden, thereby causing increased pressure. Larger bubbles, caused by larger hole size, increased pressure or fouling, reduce the available gas- liquid surface area, which reduces the overall Standard Aeration Efficiency (SAE). The efficiency of fouled, blocked or stretched materials can drop to only 30% to 40% of their stated SAE in clean water.
  • SAE Standard Aeration Efficiency
  • Non-mechanical diffused gas-liquid mass transfer systems can deliver standard aeration efficiency (SAE) of 1.6 to 7 kilograms of dissolved oxygen (DO) from air per kilowatt-hour (kg/kWh) in clean water (SAE- ANSI/ASCE Standard 2-91). Their efficiency, even when clean, is frequently reduced by the low intensity of the liquid mixing when placed in operating systems. The efficiency of a non-mechanical diffused gas-liquid mass transfer system in dirty or contaminated liquid is frequently reduced to only 40 to 50% of the clean water efficiency of the system.
  • SAE standard aeration efficiency
  • Some examples of diffused aeration systems that are not based on fine bubble diffusers include traditional mechanical diffused aeration systems.
  • Traditional diffused aerator systems can include a high speed prop mixer and a regenerative blower, such as the commercially available Aire-O 2 Triton ®, large volume per time liquid mixing systems using a gas compressor, such as the draft tube aeration system commercially available from, for example, Philadelphia Mixers Corp., and jet aeration systems using a gas/liquid mixing jet, a liquid pump and a gas compression device, such as systems commercially available from US Filter Corporation and others.
  • a gas compressor such as the draft tube aeration system commercially available from, for example, Philadelphia Mixers Corp.
  • jet aeration systems using a gas/liquid mixing jet, a liquid pump and a gas compression device, such as systems commercially available from US Filter Corporation and others.
  • Conventional mechanical diffused air systems typically have an SAE of from 0.4 to 1.6 kg/kWh.
  • low speed surface aerators give the highest SAE for mechanical aeration systems. These systems typically state an SAE of from 1.9 to 2.5 kg/kWh.
  • surface aerators achieve low gas utilization and require large volumes of gas to be mixed with liquid, causing a high rate of off-gassing, which strips volatile organics from the liquid into the gas, cools the mixture thereby reducing the biological reaction rate, and freezing components of the system during winter operation.
  • the present invention has been developed in view of the foregoing and to remedy other deficiencies of related devices.
  • the present invention provides an apparatus for mixing gas and liquid.
  • the apparatus may have a plurality of blades rotated about a common shaft.
  • the blades may have a forward portion, which cuts through a liquid, and a trailing portion.
  • Gas cavities may form either on, adjacent to or trailing the blade depending on the blade's shape.
  • the gas cavity is in communication with a gas inlet. As the blades pass through a liquid, a reduced pressure
  • the reduced pressure zone allows air to be aspirated from the gas inlet into the gas cavity where it is transferred to the liquid.
  • An aspect of the present invention provides an apparatus for mixing gas and liquid comprising a rotatable shaft having an axis of rotation, and at least one pumping blade at least partially submergible in the liquid mounted on the rotatable shaft, the at least one pumping blade comprising a gas cavity adjacent to or trailing the at least one pumping blade, wherein rotation of the at least one pumping blade through the liquid causes the liquid to move in a direction substantially perpendicular to the axis of rotation of the rotatable shaft and causes the gas to be entrained in the liquid from the gas cavity.
  • Another aspect of the present invention provides an apparatus for mixing gas and liquid comprising a rotatable shaft, at least one radially pumping blade at least partially submerged in a liquid, the at least one radially pumping blade comprising a gas cavity adjacent a trailing portion of the at least one blade, means for attaching the at least one radially pumping blade to the rotatable shaft and a gas inlet above the liquid in communication with the gas cavity of the at least one blade.
  • a further aspect of the present invention is a method for mixing gas and liquid comprising providing a at least one blade at least partially submerged in a liquid, the at least one blade comprising a gas cavity adjacent to or opposite a leading forward portion of the at least one blade, providing a gas inlet above the liquid in communication with the gas cavity of the at least one blade, and propelling the at least one blade through the liquid to create a reduced pressure zone behind the at least one blade and aspirate gas from the gas inlet into the gas cavity.
  • Fig. 1 illustrates a horizontally mounted inline mixer with inline blades for creating low-pressure zones for air entrainment in a liquid according to one embodiment of the present invention.
  • Fig. 2 illustrates a side-view of the inline mixer of Fig. 1 according to one embodiment of the present invention.
  • Fig. 3 is a cross-section of a inline blade along section A-A' of Fig. 1, showing a forward portion and gas cavity according to one embodiment of the present invention.
  • FIG. 4 illustrates two inline mixers aerating an activated sludge racetrack type containment vessel according to one embodiment of the present invention.
  • FIG. 5 illustrates a mixer on a vertically mounted shaft with inline blades of increasing length according to one embodiment of the present invention.
  • Fig. 6 illustrates a rear-view of a inline blade showing the gas cavity of the blade according to one embodiment of the present invention.
  • Fig. 7 illustrates a rear-view of a inline blade partially covered by a back plate according to one embodiment of the present invention.
  • Fig. 8 illustrates a mixer with radially pumping blades in combination with a draft tube, according to one embodiment of the present invention.
  • Fig. 9 illustrates a plan-view of the mixer of Fig. 8 according to one embodiment of the present invention.
  • Fig. 10 illustrates a mixer having radially pumping blades and axially pumping blades in combination with a draft tube according to one embodiment of the present invention.
  • Fig. 11 illustrates a plan-view of the mixer of Fig. 10 according to one embodiment of the present invention.
  • Fig. 12 illustrates a combination blade capable of axially and radially pumping the liquid in combination with the draft tube according to one embodiment of the present invention. A sectional-view of a draft tube is shown.
  • Fig. 13 illustrates a mixer having perpendicular flow to the axis of rotation pumping blades in combination with an aspirating frame and gas inlet according to one embodiment of the present invention.
  • Fig. 14 illustrates a side-view of the mixer of Fig. 13 according to one embodiment of the present invention.
  • Fig. 15 illustrates a mixer having perpendicularly pumping blades according to one embodiment of the present invention.
  • Fig. 16 illustrates a mixer supported by a float having radially pumping blades attached to the float according to one embodiment of the present invention.
  • Fig. 17 illustrates a plan view of the mixer of Fig. 16 according to one embodiment of the present invention.
  • the present invention relates to an apparatus for mixing gas and liquid by accelerating a body of liquid in the desired direction utilizing a shaft defining an axis of rotation to rotate one more pumping blades through the bulk liquid at a relatively high velocity to generate a low pressure zone in the liquid.
  • the low pressure zone draws gas from a gas inlet through an unobstructed passage ending with a gas cavity in the liquid partially defined by a portion of the pumping blade and partially defined by the liquid.
  • the blade's wake current which is the thin film of liquid that passes near the blade and moves at much higher velocities than the bulk fluid, envelops the gas cavity and shears the bulk gas cavity into small bubbles, whereby gas is aspirated in into the liquid.
  • the term “pumping blade” refers to a blade that imparts movement of the bulk liquid as well as gas entrainment into the liquid under the surface of the liquid, resulting in movement of the bulk liquid and entrained gas mixture in a controlled direction. Movement of the pumping blade through the liquid thus creates gas entrainment under the surface of the liquid rather than by spraying or otherwise projecting the liquid over its surface.
  • an “inline pumping blade” refers to a pumping blade which imparts bulk liquid movement in at least one direction substantially perpendicular to the axis of rotation of the shaft upon which the blade is mounted, and which imparts little or no bulk liquid movement in a direction parallel to the axis of rotation of the shaft.
  • a "radially pumping blade” refers to a pumping blade which imparts bulk liquid movement in directions substantially perpendicular to, and radially outward from, the axis of rotation of the rotating shaft, and which imparts little or no bulk liquid movement in a direction parallel to the axis of rotation of the shaft.
  • the blade assemblies of the present invention are perpendicular flow-generating blade assemblies rather than axial flow-generating blade assemblies.
  • a mixer 1 is shown according to one embodiment of the present invention.
  • the mixer 1 is an inline aerator having an outer shaft 12 on a horizontally mounted shaft 14.
  • the drive shaft 14 is rotatably mounted and connected to a drive assembly (not shown).
  • Projecting radially from the outer shaft 12 is a plurality of inline blades 20.
  • the inline blades 20 are preferably helically and/or equidistantly spaced about the hub 12 in multiple rows to eliminate out of balance rotation. While four rows of inline blades 20 are shown, this number can be increased or decreased without deviating from the present invention. Also, the inline blades may or may not be aligned in rows.
  • the arrows in Fig. 1 indicate rotation.
  • inline blades 20 may be generally pyramidal in shape having a forward portion 21 and a gas cavity 22 opposite the forward portion.
  • the forward portion 21 of each inline blade 20 enters the liquid 2 and is immediately followed by the trailing portion 22.
  • some energy from the blade is transferred to the liquid 2 to accelerate the liquid 2 and a reduced pressure zone is created immediately behind the inline blade 20 within the liquid 2.
  • This low pressure zone allows gas, in this embodiment air, to fill a gas cavity 23 created between the blade 20 and the liquid 2.
  • a gas inlet is formed by the trailing portion of the inline pumping blade which extends above the surface of the liquid.
  • the mixers 1 are shown in Fig. 4 as inline aerators 20 in a racetrack style containment vessel 3.
  • the aerators 10 are positioned above a fluid 2 similar to the orientation of Fig. 1.
  • One aerator 10 is attached to a drive unit 30 at a first end and a power converter 31 at a second end.
  • Another aerator 10 is connected at one end to the power converter 31 and at another end to a bearing 32.
  • Liquid flow is shown in Fig. 4 by the arrows.
  • the aerators 10 provide both circulation within the vessel 3 and aeration of the liquid.
  • vessel 3 is shown as an oval shaped pool in Fig. 4, it may be of any configuration capable of containing a liquid, for example, one or more channels or an open tank.
  • Drives may be either, coupled, independent, or one drive operating two counter rotating shafts.
  • the mixer 1 may also have a vertically mounted shaft 14 and outer shaft 12 projecting from outer shaft 12 are inline blades 20.
  • the inline blades 20 shown in the embodiment illustrated in Fig. 5 are of similar configuration to those blades described above. However, it should be noted that the mixer 1 shown in Fig. 5 also has a gas inlet 26 at an end of the outer shaft 12 that projects above the surface of the water 2.
  • the outer shaft 12 may be hollow or have channels within to allow gas to be transferred to apertures 27 in the outer shaft 12.
  • the apertures 27 near the base of the blade allow gas to pass through the outer shaft 12 and to the blades 20.
  • the base of the blade is that portion of the blade connected to the shaft.
  • the inline blades 20 may increase in radial length from shorter blades 20 near the surface of the liquid 2 to relatively longer blades 20 at increasing depths.
  • the longer blades are used to increase the angular velocity of the blade 20 tips, which increases the differential between the blade velocity and the liquid velocity. Accordingly, the longer inline blades 20 allow gas to be aspirated to the gas cavities 22 even at increased pressures associated with the increased depth. Gas cavities 23 and wake currents 43 are also
  • the mixer 1 may or may not have a mounting 24 at the end of its shaft 14.
  • Fig. 6 and Fig. 7 show rear portions of two different inline blades 20. Each shows a trailing portion 22. However, the inline blade 20 of Fig. 7 has an additional back plate 28.
  • the back plate 28 allows the mixer 1 to be run at a much lower rpm than is required with a blade having a completely open trailing portion.
  • the back plate 28 is often abutted to the hub 12 and projects some distance outwardly toward the tip of the blade 20.
  • a back plate 28 similar to that shown in Fig.
  • a gas inlet 26 may be used somewhere along the outer shaft 12 so that an unobstructed path exists from atmosphere through the trailing portion 22 to the gas cavity 43 and the liquid 2.
  • a inline blade 20 is used on a horizontal mixer like that of Fig. 1, an opening to the atmosphere may be located in the back plate 28 at some point above the surface of the liquid 2. This opening above the surface of the liquid 2 is in communication by way of the trailing portion 22 with an opening near the tip of the inline blade 20.
  • Fig. 6 also shows a mini-blade 29 which may be attached to another blade to increase the size of the gas cavity and the liquid/gas interaction.
  • Apertures 27 may be through the shaft near the base of the blade allow gas to pass through the outer shaft 12 and to the blades 20.
  • a gas and liquid mixer having with radially pumping blades 40.
  • a vertically mounted shaft 14 is connected to a drive assembly (not shown).
  • a frame 50 Connected to the shaft and projecting radially from the shaft 14 is a frame 50.
  • the frame 50 is connected at one end to the shaft 14 and at its outermost end to two or more radially pumping blades 40.
  • the radially pumping blades 44 are substantially vertically oriented.
  • the radially pumping blades 40 are rotated about the shaft 14 and have a forward portion 44, which leads the blade 40 through the liquid 2, and a trailing portion 45.
  • a gas cavity 42 Adjacent to, on, or at the trailing portion 45 of the blade is a gas cavity 42 in communication with a gas inlet 46 above the level of the liquid 2.
  • the radially pumping blades 40 As the radially pumping blades 40 are rotated about the shaft 14, low pressure zones develop behind the blades which permits gas to be aspirated through the gas cavities 42 and into the liquid 2.
  • the radially pumping blades 40 generally narrow towards the forward portion 44.
  • the gas cavity 42 in the rear of the blade 40 is widest at its uppermost portion extending above the surface of the liquid 2 and narrows as the depth of the blade increases.
  • the arrows in Fig. 8 indicate liquid 2 flow.
  • 1149684 9 may be positioned above a draft tube 60. In this manner, liquid 2 is aerated and directed radially outward by the radially pumping blades 40 after being drawn upward through the draft tube 60. In a mix tank, this creates a circulatory flow of the liquid 2 first, radially outward from the mixer 1, then up through the draft tube 60 before being directed radially outward again.
  • Fig. 9 shows a plan view of the mixer of Fig. 8.
  • the radially pumping blades 40 are diagonally oriented with respect to the shaft 14. More specifically, the blades 40 are further from the shaft 14 at a lower portion. This orientation aids in aspirating gas to the lower portion of the blades 40.
  • a mixer 1 having radially pumping blades 44 and a draft tube 60 similar to that illustrated in Fig. 8 is shown. Additionally, the mixer 1 in Fig. 10 has axial pumping blades 70 mounted on the frame 50 in a horizontal position. The axial pumping blades 70 assist in drawing fluid 2 upwardly through the draft tube 60. Again, arrows indicate the direction of liquid 2 flow.
  • Fig. 11 illustrates a plan view of the mixer 1 shown in Fig. 10.
  • Fig. 12 illustrates a mixer 1 having combination blades 80 capable of axially pumping fluid upwardly from the draft tube 60 (shown in sectional view in Fig. 12) and also radially pumping and aerating the liquid 2.
  • the combination blades 80 in this embodiment have an upper portion 81, a lower portion 82, a fuller portion 83 and a gas cavity 46.
  • the lower portions 82 provide upward pumping of the liquid 2 in an axial direction, while the upper portion 81 of each blade provides radial thrust of the liquid 2.
  • the upper portion 81 of a combination blade has a forward portion 83 and a trailing portion 84 at the trailing end of the combination blade 80.
  • the gas cavity runs longitudinally along the upper portion 81 of the blade 80 and is in communication with a gas inlet 46 at a point along the blade 80 above the surface of the liquid 2.
  • a gas liquid mixer analogous to a Darius or Gorlov spelling turbine is shown having a gas inlet 46 is in gaseous communication with an aspirating frame 90 which has a central shaft and radially extending arms.
  • the arms of the aspirating frame 90 are connected to radially pumping blades 100.
  • the radially pumping blades 100 have a forward portion 102 and a trailing portion 104.
  • the trailing portion 104 is in communication with aspirating frame 90 by way of one or more apertures 106.
  • the radially pumping blades create low pressure zones in their wake which, in turn, aspirates gas into the gas cavity 104 then into the liquid 2.
  • a rotating seal 92 prevents flooding of the aspirating frame 90 and gas inlet 46
  • Fig. 14 illustrates a side view of the mixer 1 shown in Fig. 13.
  • the mixers 1 of Fig. 8 through 14 show only two blades.
  • the mixers 1 may have any number of blades, for example, six or eight blades.
  • a mixer 1 having perpendicularly pumping blades 110 with forward portion 114 and trailing portion 112. This mixer is configured to pump water in a direction perpendicular to the vertical shaft 14. Again, the blades 110 are in communication with a gas inlet 46 above the surface of the liquid 2.
  • the mixers of Figs. 5-15 are often supported by structural members, which support the mixers and drive attached thereto. However, as seen in Figs. 16 and 17 these supports may not be necessary.
  • the shaft 14 may be connected to a float 120 to support the mixer.
  • the blades may also be supported on a rotating float.
  • the blades 40 may be attached to or incorporated in the float 120.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne un appareil de mélange de gaz et de liquide. L'appareil peut comporter une pluralité de lames en rotation autour d'un arbre commun. Les lames peuvent avoir une partie avant, coupant dans un liquide, et une partie de fuite, constituant la partie d'attaque d'une cavité de gaz. La cavité de gaz est en communication avec une admission de gaz et le fluide de base. Tandis que les lames traversent un liquide, une zone de pression réduite est formée juste derrière la lame. La zone de pression réduite permet d'aspirer l'air depuis l'admission de gaz dans la cavité de gaz adjacente à la lame. Le gaz dans la cavité de gaz est cisaillé en bulles discrètes et transféré vers le liquide sous l'effet des courants des sillons de la lame de fuite.
PCT/US2007/065514 2006-03-31 2007-03-29 appareil destiné au mélange des gaz et des liquides WO2007115099A2 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA 2646848 CA2646848C (fr) 2006-03-31 2007-03-29 Appareil destine au melange des gaz et des liquides
CN2007800115304A CN101410171B (zh) 2006-03-31 2007-03-29 用于混合气体和液体的设备
EP07759706A EP2001579A4 (fr) 2006-03-31 2007-03-29 Appareil destiné au mélange des gaz et des liquides

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US78841906P 2006-03-31 2006-03-31
US60/788,419 2006-03-31

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WO2007115099A2 true WO2007115099A2 (fr) 2007-10-11
WO2007115099A3 WO2007115099A3 (fr) 2007-11-22

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EP (1) EP2001579A4 (fr)
CN (1) CN101410171B (fr)
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Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8146894B2 (en) 2004-06-21 2012-04-03 Hills Blair H Apparatus for mixing gasses and liquids
US8366312B1 (en) * 2006-08-01 2013-02-05 United Services Automobile Association (Usaa) Systems to store and agitate fuel
CN103585924B (zh) * 2013-11-29 2015-01-14 江苏省环境科学研究院 一种搅拌推进器的桨叶装置及其用途
CN104737966A (zh) * 2013-12-30 2015-07-01 崔汇文 空气刀及气刀轮
US10376856B2 (en) * 2017-07-28 2019-08-13 Uop Llc Methods for fluid contacting in a downflow vessel
TWI678150B (zh) * 2018-05-02 2019-12-01 邱文慈 增氧水車用的葉輪
CN110373227B (zh) * 2019-07-04 2021-05-25 上海米素环保科技有限公司 一种氢氛保护抑制结焦的加氢反应方法和装置
CN110980980A (zh) * 2019-10-24 2020-04-10 山东尤根环保科技有限公司 一种射流式气水混合型废液废水处理装置
US12006232B2 (en) * 2020-06-09 2024-06-11 Rapid Water Technology LLC Water processing apparatus
CN111744389A (zh) * 2020-07-07 2020-10-09 王玛冰 一种用于化妆品生产的乳化设备
CN114471206B (zh) * 2022-01-12 2024-05-28 武汉理工大学 一种大功率快速响应燃料电池测试台用加湿器

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5116501A (en) 1991-01-25 1992-05-26 House Manufacturing, Inc. Paddlewheel aerator drive mechanism
US5916491A (en) 1997-01-16 1999-06-29 Rhone-Poulenc, Inc. Gas-liquid vortex mixer and method
US5925290A (en) 1997-08-08 1999-07-20 Rhone-Poulenc Inc. Gas-liquid venturi mixer
US6135430A (en) 1992-08-17 2000-10-24 Praxair Technology, Inc. Enhanced gas dissolution
US6145815A (en) 1992-08-17 2000-11-14 Praxair Technology, Inc. System for enhanced gas dissolution having a hood positioned over the impeller with segregating rings
US6273402B1 (en) 2000-01-10 2001-08-14 Praxair Technology, Inc. Submersible in-situ oxygenator
US20030030157A1 (en) 2001-08-10 2003-02-13 Aeromix Systems, Inc. Horizontal surface aerator

Family Cites Families (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US53876A (en) * 1866-04-10 Improvement in churns
US95514A (en) * 1869-10-05 Improvement in churn-dashers
US1253394A (en) * 1917-09-05 1918-01-15 Robert C Lambie Churn-dasher.
DE927724C (de) * 1939-03-22 1955-05-16 Hans Rinne Belueftungsvorrichtung zum Veredeln von Schokoladenmassen mit in die Masse eintauchendem Ruehrwerk
US2293183A (en) * 1939-04-03 1942-08-18 American Well Works Mixing turbine
US2433592A (en) * 1945-05-09 1947-12-30 Lionel E Booth Aeration method and machine
US3393802A (en) * 1964-02-03 1968-07-23 Denver Equip Co Aerating assembly for froth flotation cells
FR1504011A (fr) * 1966-10-20 1967-12-01 Venot Pic Sa Dispositif de circulation et d'aération de fluides
US3452873A (en) * 1967-07-24 1969-07-01 Fairfield Eng Mfg Aerator for sewage treatment systems
US3532327A (en) * 1968-06-28 1970-10-06 George G Landberg Draft tube arrangement for starting-up and settled solids
US3630498A (en) * 1968-07-31 1971-12-28 Namco Corp Apparatus for gasifying and degasifying a liquid
US3643403A (en) * 1970-04-29 1972-02-22 Richard E Speece Downflow bubble contact aeration apparatus and method
US3677528A (en) * 1970-12-31 1972-07-18 Shell Oil Co Fluid diffusion apparatus
US3703462A (en) * 1971-01-06 1972-11-21 George W Smith Sewage treatment apparatus and method
US3911064A (en) * 1971-04-08 1975-10-07 Union Carbide Corp System for gas sparging into liquid
US3775307A (en) * 1971-04-08 1973-11-27 Union Carbide Corp System for gas sparging into liquid
US3856272A (en) * 1972-06-08 1974-12-24 Richards Of Rockford Inc Floating mixer
US4193950A (en) * 1975-07-04 1980-03-18 Linde Aktiengesellschaft Apparatus for introducing gas into a liquid
US4095918A (en) * 1975-10-15 1978-06-20 Mouton Jr William J Turbine wheel with catenary blades
ES452807A1 (es) * 1975-10-31 1978-01-01 Blum Albert Dispositivo para la introduccion de gases, especialmente ai-re, en liquidos.
CH606801A5 (fr) * 1975-12-02 1978-11-15 Escher Wyss Ag
US4169047A (en) * 1977-05-09 1979-09-25 Baker International Corporation Flotation machine with mixing and aeration impeller and method
AT348953B (de) * 1977-08-26 1979-03-12 Alfa Laval Stalltech Vorrichtung zur begasung und umwaelzung von fluessigkeiten
NL7803906A (nl) * 1978-04-12 1979-10-16 Noordvos Schroeven Bv Werkwijze, inrichting en propeller voor het verdelen van een gasvormig, poedervormig of vloeibaar materiaal in een vloeistof.
US4231974A (en) * 1979-01-29 1980-11-04 General Signal Corporation Fluids mixing apparatus
US4364826A (en) * 1981-04-13 1982-12-21 Masashi Kato Waterwheel system for aeration
US4512936A (en) * 1981-07-03 1985-04-23 Ebara Corporation Aeration apparatus
US4519715A (en) * 1981-11-30 1985-05-28 Joy Manufacturing Company Propeller
US5525269A (en) * 1985-03-22 1996-06-11 Philadelphia Gear Corporation Impeller tiplets for improving gas to liquid mass transfer efficiency in a draft tube submerged turbine mixer/aerator
NL8601602A (nl) * 1986-06-19 1988-01-18 Pielkenrood Vinitex Bv Werkwijze en inrichting voor het invoeren van een gas in een vloeistof.
US5043104A (en) * 1987-11-04 1991-08-27 Barrett Haentjens & Co. Apparatus for gas absorption in a liquid
US4908131A (en) * 1988-01-15 1990-03-13 Moore Thomas R Aeration device
GB8827302D0 (en) * 1988-11-23 1988-12-29 Nytek As Mixing device
US6017020A (en) * 1990-02-01 2000-01-25 Baughman; Michael L. System and method for diffusing gas bubbles into a body of water
US5112192A (en) * 1990-07-26 1992-05-12 General Signal Corporation Mixing impellers and impeller systems for mixing and blending liquids and liquid suspensions having a wide range of viscosities
JPH04197496A (ja) 1990-11-28 1992-07-17 N Ii T Kk 流体混合方法
US5431860A (en) * 1991-02-01 1995-07-11 Richter Gedeon Vegyeszeti Gyar Rt. Complex mixing device for dispersion of gases in liquid
US5171486A (en) * 1991-12-09 1992-12-15 Harry Penno Rotating humidifier
CA2221923A1 (fr) * 1995-05-23 1996-11-28 Ebara Corporation Procede de traitement aerobie des eaux usees et bassin de traitement
US5755976A (en) * 1996-11-13 1998-05-26 Kortmann; Robert W. Pneumatic bubble aeration reactor and method of using same
US5711902A (en) * 1996-11-15 1998-01-27 Hsu; Yung-Chien Gas-induced reactor
US5942161A (en) * 1997-07-16 1999-08-24 Battelle Memorial Institute Device and process for liquid treatment
US5921745A (en) * 1997-09-29 1999-07-13 Hydroenergy Corporation Low head turbine
US6499727B1 (en) * 2001-06-15 2002-12-31 Jack Bill Sylvester Internal drive aerator for body of liquids
US6877959B2 (en) * 2003-06-03 2005-04-12 Mixing & Mass Transfer Technologies, Llc Surface aeration impellers
US7427058B2 (en) * 2005-05-17 2008-09-23 Galletta Jr Robert J Method and apparatus for aeration of liquid medium

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5116501A (en) 1991-01-25 1992-05-26 House Manufacturing, Inc. Paddlewheel aerator drive mechanism
US6135430A (en) 1992-08-17 2000-10-24 Praxair Technology, Inc. Enhanced gas dissolution
US6145815A (en) 1992-08-17 2000-11-14 Praxair Technology, Inc. System for enhanced gas dissolution having a hood positioned over the impeller with segregating rings
US5916491A (en) 1997-01-16 1999-06-29 Rhone-Poulenc, Inc. Gas-liquid vortex mixer and method
US5925290A (en) 1997-08-08 1999-07-20 Rhone-Poulenc Inc. Gas-liquid venturi mixer
US6273402B1 (en) 2000-01-10 2001-08-14 Praxair Technology, Inc. Submersible in-situ oxygenator
US20030030157A1 (en) 2001-08-10 2003-02-13 Aeromix Systems, Inc. Horizontal surface aerator

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2001579A4

Also Published As

Publication number Publication date
EP2001579A2 (fr) 2008-12-17
WO2007115099A3 (fr) 2007-11-22
CN101410171B (zh) 2013-04-24
CA2646848A1 (fr) 2007-10-11
EP2001579A4 (fr) 2012-02-01
CN101410171A (zh) 2009-04-15
US20070228584A1 (en) 2007-10-04
US8146895B2 (en) 2012-04-03
CA2646848C (fr) 2014-11-18

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